Ore-concentrator.



Hm-732319 PATEKTED J N 30, 1903. E. B. ROGERS -& F. P. HANSON.

ORE GONGEN'I RATOR.

APPLICATION IILBD mm: 29, 1901.

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. PATENTED JUNE 30, 1903.. E. B. ROGERS & F. P. HANSON,

ORE GONGENTRATOR. APPLIUATION FILED mm: 29, 1901.

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. Q a 1% a N 3/ x Q III III III H In It UNITED STATES Patented June 30,1903 PATE T OFFICE.

OF SAN FRANCISCO,

ORE-CONQENTRTATOR SPECIFICATION forming part of Letters Patent No.732,319, dated June 30, 1903.

Application filed June 29, 1901.

bined influence and action of the vibratory motion of the table andcurrents of water fiowing over the table-surface transversely across orin directions more or less opposed to the motion. In concentrators ofthis description it is customary to providethe surface of the table withriffiesor standing strips ektending longitudinally and in the generaldirection of the motion, provision being made also for varying theinclination of the table-surface transversely for the purpose ofaccelerating or retarding the flow of the water.

The present invention in this class of concentrators has for its objectmainly to provide an improved construction of riffled surface by whichthe mineral particles will be effectively separated and concentrated,and at the same time the gangue, of varying degrees of richness,will beclosely graded and the grades separated one from the other foradditional treatment either upon the same table or by passing it toanother table.

The invention has for its object, further, to provide a simple andefficient means for-setting and fastening in place the spring-stand ardsthat carry the shaking-table and for adjusting the degrees ofinclination of the tablesurface while the machine is at work.

To such ends and object our said improvements consist in a peculiarconstruction of riffied table surface and in certain novel parts andcombination of parts, producing an improved machine for the purposespecified, as hereinafter described, and pointed out in the claims atthe end of this specification, reference being had therein to theaccompanying drawings, forming part thereof.

Figure 1 of the drawings is a top plan of a troduced.

Serial No. 66,548. (No model.)

concentrating-table havinga riffled table-surface constructed inaccordance with our invention, a portion of the table between thefeeding-on end and the concentrates-dischargin g end being broken out toreduce the length of the figure within 'the limits of the sheet. Fig. 2is an elevation of the table, taken from thehigher side, where thematerial is first in- Figs. 3, 4, and 5 are details, on an enlargedscale,'of the spring-standards on which the table is mounted, showingthe manner of securing the top end of the standard to the table and thebottom end or foot to the stationary frame, Fig. 3 being a verticallongitudinal sectional view of the sockets and fastenings,Fig.4 avertical transverse section, and Fig 5 a top plan of the removable keythat secures the ends of the standards of the sockets. Fig. dis avertical transverse section taken through the table-surface, showing incross-section the peculiar form of riffles employed.

The table a is mounted on spring-standards Z) Z) in the usual manner,with an inclination breadthwise or transversely of the surface,

the foot of each standard being secured to the stationary frame and thetop end to the bottom of the movable table by sockets and fastenings,inthe construction of which provision is made for securely fixing thestandards so that they will not be loosened by the vibrations, and atthe'saine time allowing a standard to be removed and another set inplace without loss of time.

In Figs. 1 and 2 of the drawings We illustrate a simple mechanism forgiving a rapidlyvibrating motion to the table of the character orquality necessary for producing a continuous progressive movement of themineral upon the-surface of the channels or spaces between the riffles,but as no special novelty is claimed for the construction there shown adetailed description of such mechanism is not necessary to a clearunderstanding of the present improvements, which relate especially tothe other parts of the machine. Other means than that thereinillustrated can be employed for giving vibratory motion to the table.

The shape of the table in outline is prefer- I00 ably an irregularparallelogram, decreasing in width from end to end along one side of thelonger sides and having the remaining side and the top ends at rightangles to one another. This reduction in the width of the table from thefeeding-on end to the concentrates-discharging end is a feature observedin the construction of many styles of tables now in use and one that isallowed by the reduction in the mass or body of the material in itsprogress from the feeding-011 side to the head or upper end, where themineral is collected and discharged.

Our present construction of rili'led surface is applicable, however, totables that are of other shapes in outline, and while we describe andshow a table-surface varying in width transversely we do not desire orintend to confine our improvement to that particular shape of table.

The part or feature of our improvement which relates to the constructionof the riffled surface consists in dividing that portion of the workingsurface a from the end nearest the feeding-on trough c, which fordistinction may be termed the lower end, to about the middle line of thetable into a number of parallel channels 3 by a series of rifiles orstanding strips 2 of uniform length extending lengthwise of the table inthe general direction of the motion. Commencing at the lower end beforementioned, the rifiles 2 terminate on a common line or a: runningtransversely across the table and in about the middle thereof from thehigher to the lower side, and for the principal portion of that surfacebe tween the lower end and such median line the riffles are set andspaced at relatively wide distances apart. ()n that portion of the samesurface which lies ii-nmediatelyin front of the feeding-on trough andwhich first receives the material from the trough the riflies 2 increasein number and are closely set and that portion of the table-surface iscomposed of narrower channels ithan the principal portion below. On thishigher side of the table the material as it flows from the fecdingontrough is at first retarded, and its movement laterally is resisted bythe closely-rittled section to such an extent or degree that the mineralparticles are kept under the influence of the vibratory motion, to beacted on by the motion to a greater degree than by the flow of thewash-water and the inclination of the table-surface, while that portionof the material which by virtue of its light and valueless character iscarried by the wash-water over the riftles last mentioned is allowed topass more freely across the remaining portion of the riilied surfacebelow because of the reduction in the number of riiiles on such lowersection. On that part of the table a further variation in the characterof the rifiied surface is made by inserting a series of intermediaterifiies 5 between the widely-set riflies 2, so as to increase the numberof riftles for a portion of the table-surface without affecting thecharacter of the remaining portion of the openly-riffled surface nearerthe lower end of the table. For this purpose the intermediate rifiles 5are set between the rifiles 2, starting from a line 1 y runningdiagonally across the openly-rifiled section from the higher cornerdownward to the lower side of the table and terminating at the medianline a: w, or thereabout. Starting from that diagonal line y y, theintermediate rifiies are carried beyond the transverse median line :0 00toward the foot of the table, and upon that portion of the surface lyingbetween that line and the concentrates-discharge end they are arrangedin stepped position extending beyond the ends of the principal rifiies 2so as to terminate on a diagonal line from the higher to the lower sideof the table, and dividing that surface also into a smooth or unriflledportion nearest the head of the table of a triangular shape and ariffled portion or section between the diagonal line 2 z and theadjacent ends of the principal rifl les 2. The three series of riifies 24 5 set in this manner produce a strip or section of rifiied surfacethat extends diagonally across the table-surface from the higherfeeding-011 side to the relatix'elylower end, where the cleanconcentrates are discharged and on which the riflles vary in number bothin a transverse direction directly across the table from the higher tothe lower side and also in a longitudinal direction or coincident withthe vibratory motion. In addition to this the rifiies will be seen tovary in number in a diagonal direction, producing a graduated surfacethat presents regularly-decreasing resistance in the diagonal path orcourse in which the middlings are caused to travel by the combinedaction of the motion and the inclination of the table and the currentsof Water. By varying the character of the riflied surface in this mannerwe secure a thorough grading of the mineral-bearing gangue, holding thedifferent grades under the influence of the vibrations without retardingtoo much the lateral movement and discharge of the worthless portionsfrom the lower side of the table. In this operation we have found thatthe best results are secured by retarding or holding back the materialto the greatest degree or extent, at first on the highest part of thetable-surface, where the riliies are increased in number for thatpurpose, and causing the separation of the mineral to take place mostlyon the highest part, where it is first introduced.

In concentrators of this class or description, in which the moving tableis set on spring legs or standards, it is necessary to attach the endsof the standards rigidly both to the table and to the stationary frame,as well as to fasten them securely, so that they will not by workingloose affect the character of the vibrations set up in the table, and itis desirable also to provide for readily taking out a standard when itbecomes broken and for placing a new one in position without throwingthe machine out of service. In this part of our improvement the top andbottom ends ICQ the construction of which will be understood.

from Figs. 3 and 5 of the drawings. The standard I) has a fl at andrelatively wide shank 1), reduced in thickness to give the properstructed of wood. The top socket-iron d isprovided with a flange d, withscrew-holes for securing itagainst the under side of the table, and thefront side of the socket is open to admit the head of the standard,which is inserted and removed from the front side by a lateral movement,a slit (1 in the bottom of the same being provided to admit the flatshank of the standard. The lower socketiron 6 being longer than the topiron, it has a seat e at the bottom for the wedge-shaped foot b of thestandard, and it is also open on one side for inserting the standard.The top rim is provided with aprojecting rim or flange e to rest on thecross-timber f, through which the socket-iron is let, as shown in Fig.3. The lower socket-iron is made longer than the upper socket-iron forthe purpose of dropping the foot of the standard, allowing a longstandard to be used, and at the same time enabling the surface of themoving table to be kept at a convenient height above the base. The headand foot of the standard after they are inserted in their respectivesockets are fastened in place by a forked slotted key g, inserted fromone side of the socket, so as to straddle the shank of the standard justat the junction with the wedge-shaped head. This key, which is madesufficiently long for the purpose, extends beyond the side of thesocket-iron and in line with a lug 71. on that part, and by means of ashort bolt and nut 2', passed through the lug and the end of the key,the latter is held in place, embracing the shank of the standard andpreventing that part from working out of its position in the socket.

The means for varying the inclination of the table consists of awedge-shaped slideblock m, under one end of each of the crosstimbers f,that carries the socket-irons e of the standards, and a fixed incline non the under side of the timber directly over the slideblock, theinclined faces of the two parts being in working position to producevertical movement of that end of the cross-timber from the longitudinalmovement of the slide-block. All the slide-blocks are connected by along rod p, running along the side of the stationary frame, for settingthem simultaneously and with an equal throw, the outer end of the rodbeing screw-threaded and fitted to a threaded nut or sleeve 0", with ahand-wheel s for turningit. The ends of the movable OlOSS-illlllbersthat are raised and lowered by the wedges above described are detachedfrom thelongitudinal bed-timbers in which they rest, but

are confined against lateral movement by angle-irons t, bolted to thestationary timbers on each side of the movable timber. The constructionwill be clearly understood from Fig. 2 of the drawings.

In situations where it may be desired to return different portions ofthe tailings to the higher side of the table for a second runningthrough the table a rotary cylindrical elevator can be connected withthe main shaft of the vibrating mechanism, as illustrated in Figs. 1 and2, the connection being conveniently made by a counter-shaft y, drivenfrom the main shaft o by belt and pulleys as and c011- nected to theshaft w of the elevator by a belt and pulleys 2', as illustrated inFig. 1. A pipe 1, leading from the elevator to the feeding-in trough,conducts the material over the table and delivers it for a seconddistribution on the table surface. The construction of this elevatingmeans is not described or shown in detail by us, for the reason that itcontains no specially novel features.

Having thus fully described our invention, what we claim as new therein,and desire to secure by Letters Patent, is-

1. A laterally-inclined, vibrating ore-concentrating table having itssurface divided by riffles extending longitudinally thereof, and in thegeneral direction of the vibratory movement, the riffles at the high endof the table being arranged uniformly close together for a shortdistance, the remaining riffles upon the table being arranged uniformlycomparatively far apart, and intermediate rifl'les ar-' ranged to extendfrom a line extending diagonally across the surface of the table, overthe portion thereof containing the widely-arranged riffles,substantially as described.

2. In an ore-concentrating table, the combination with atransversely-inclined table-surface having a vibratory motion in thegeneral direction of the length of the table, of a plurality of parallellongitudinally-set rifiies, variably spaced in a transverse direction,pro ducin g a closely-set uniformly-spaced section in the vicinity ofthe feeding-on side of the table, and an openly-set, uniformly-spacedsection below, and intermediate, uniformlyspaced riffies arranged instepped position from a line extending diagonally across the tablebetween the openly-set riffles and parallel with the principal riffiesbelow said closely-set section.

3. Atransversely-inclined ore-concentrating table having a riffledsurface, a group of riffles being set close together at the high side ofthe table while the remainder of the table is covered with riffles setfar apart, intermediate riffles arranged to extend diagonally of thetable, so that the widely-spaced riffies project between every otherpair of diagonally= arranged riffles, substantially as described.

4. The combination with an inclined ore vibrating concentrating-table,and a stationary bed, of a spring-standard having wedgeshaped heads andsocket-irons having flanges for securing them to the table and the bedrespectively, said socket-irons having wedgeshaped sockets adapted toreceive the heads of the standards, keys for securing the standardstherein and means for detachably fastening the keys.

5. The combination with a vibrating oreconcentrating table, of thestationary bedtimbers, the movable cross-timber f, socketirons (l esecured therein, spring-standards I) having their ends fixed in thelower ends of the sockets on the stationary frame but being free tovibrate in said sockets above that point, inclines 'n on the movabletimbers, wedge-shaped slide-blocks m setin operative position thereto,and the rod p, threaded nut and hand-wheel as a means for moving andsetting the slide-blocks, the sockets holding the standards againstendwise movement.

6. In an ore-concentrating table the combination with atransversely-inchned tablesurface having a vibratory motion in thegeneral direction of the length of the table, of a plurality oflongitudinally-set riilies 2, variably spaced in a transverse directionproducing a closely-set section in the vicinity of the feeding-on sideof the table and an openlyset section below, and intermediate rifiiesarranged in stepped position between the openly-set riflies and parallelwith them.

7. The combination with an inclined ore vibrating concentrating-table,and a stationary bed of spring-standards for supporting the table onsaid bed, sockets upon the table for receiving the upper ends of thestandards, and comparatively deep sockets formed EDWARD B. ROGERS. [n s]FREDRICK P. HANSON. I L. s.j

\Vitnesses:

EDWARD E. OSBORN,

M. REGNER.

